Do you know anything about the pressure in these tubes? I'm sure
the mercury vapor rectifier tubes are supposed to be vacated of air, but
what is the mercury vapor pressure and what is the difference in pressure
from cold to hot. I wonder if it is just a result of a vacuum leak that
causes some
Don't think MV rectifiers are much different with regard to pressures,
and heating time than your ordinary flourscent light. Its MV with
phospor coating on the glass, and as I understand it, the ballast is
simply an inductive current limiting device.
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